Healthy Food 1. Eating is fun, especially when you are hungry. Most people have a favourite food. Some people enjoy eating sweet things like cakes, chocolates and ice cream. Other people enjoy savoury foods like cheese and meet. Enjoying eating is our body’s way of making sure that is gets the things it needs to work properly.2. Food helps us to keep warm, talk, run and do all the other things we do. It helps us to grow and stay healthy.3. Vitamins also help us to be healthy. Scientists name vitamins after the alphabet. All of them are very important, for example: vitamin C keeps our skin and gums healthy. It is found in fresh fruit and green vegetables, such as oranges, blackcurrants, lettuce. Brussels sprouts and spinach also contain a lot of vitamin C.4. Vitamin D helps our bones to grow strong and hard, and we are able to make it for ourselves if our skin gets enough sunlight. But we can also get vitamin D if we eat fish, milk, butter, cheese and margarine. Some people buy pills and tablets containing vitamins. But most of us get more than enough of them from our food.2)Закончи предложения, выбрав правильный вариант.1. Food helps us a) to keep fitb) to be healthy c) to get fun 2. Vitamins are called aftera) the colors b) fruits and vegetablesc) the alphabet 3. We can get vitamin Da)in orangesb)in milkc) in juice
Ответы
2 Dal was taught medicine at Dorpat University.
3 While travelling about Russia,sayings and folk tales were collected by Dal.
4 Some Russian tales were written into poems by Pushkin.
5 Some of the stories were prepared for publication by Afanasyev.
6 Explanatory dictionary of the live great Russian language was published by Dal in the 19th century.
7 The year 2000 was declared the international year of vladimir dal by UNESCO.
8 A lot was done for the development of the Russian language and culture by Dal.
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ALTERNATING CURRENT
Alternating current (AC) is an electric current which periodically reverses
direction, in contrast to direct current (DC) which flows only in one direction.
Alternating current is the form in which electric power is delivered to businesses
and residences, and it is the form of electrical energy that consumers typically use
when they plug kitchen appliances, televisions and electric lamps into a wall
socket. A common source of DC power is a battery cell in a flashlight. The
abbreviations AC and DC are often used to mean simply alternating and direct, as
when they modify current or voltage.
Тhe number of cycles per second is the frequency of an alternating current.
Тhere are two frequencies: the standard for Europe is 50 cycles per second while
the standard for the USA is 60 cycles per second. А standard frequency has а great
advantage since different systems сan bе interconnected.
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ответы подчнркнуты:
1. Food helps us
a) to keep fit
b) to be healthy
c) to get fun
2. Vitamins are called after
a) the colors
b) fruits and vegetables
c) the alphabet
3. We can get vitamin D
a)in oranges
b)in milk
c) in juice